Candle Meter: Also known as a lux and defined as the illumination measured on a surface at a distance of one meter from a light source of one international candle power.

 

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Candle Meter: Also known as a lux and defined as the illumination measured on a surface at a distance of one meter from a light source of one international candle power.

Pitch Diameter: The diameter of a thread at an imaginary point where the width of the groove and the with of the thread are equal.

Picometer: One picometer is 10-12 meters.

Personal People Meter (PPM): Hardware currently being tested by Arbitron. The PPM is a pager-sized device that is worn by consumers throughout the day to automatically detect inaudible codes that radio and television br . . . View Full Definition

Port Diameter: The measurement across the port opening. Measured as internal diameter (not outer diameter .

Photometer: Any of a number of atmospheric phenomena which appear as luminous patterns in the sky. They do not directly cause adverse weather. They include halos, coronas. rainbows, and fogbows.

Potentiometer: A three-terminal variable resistor. Two terminals connect to the ends of a flat resistor, while the third terminal is attached to a moveable contact that interfaces with the resistive elemen . . . View Full Definition

Quadruple Meter: Basic metrical pattern of four beats to a measure: also common time.

Qualitative Meter: Meter that relies on patterns of heavily stress syllables and lightly stressed meters. In English, most poems are qualitative in nature. This contrasts with quantitative meter (below), which . . . View Full Definition

Pyrometer: A device for measuring the high temperatures in a heat-treating furnace.